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(A) Dry season greening (P < 0.05) of the Amazon forests and (B) precipitation relationships (correlation coefficient; P < 0.05) of Amazon forests and grassland savannahs. Monthly estimates were averaged between 2000 and 2012 but exclude the drought years of 2005 and 2010. Estimates of NDVI were normalized to a nadir view and a solar zenith angle of 45°.
